JPH0931489A - Liquid concentrated detergent composition - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide a liquid concentrated detergent composition which is excellent in fluidity, water solubility, and detergency and which is less irritating to the skin. A 2-hydroxypolyoxyalkylene alkyl ether sulfate (A) represented by the following general formula (1) and a nonionic surfactant (B) represented by the following general formula (2) and the like. (A) containing a surfactant
And the weight ratio of (B) is (A) :( B) = 95: 5-1
The liquid concentrated detergent composition is 5:85. Embedded image Embedded image

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a liquid concentrated detergent composition having good detergency, less irritation to the human body, and low water content.

[0002]

2. Description of the Related Art Anionic surfactants are widely used as detergents because they have excellent foaming power and cleaning performance, and nonionic surfactants have excellent cleaning performance. Further, household cleaning agents for tableware, housing, body, and hair need to be hypoallergenic to the human body because they come into direct contact with the human body at the time of use, and their shape is a liquid that is easy to use. Preferably. In order to satisfy these conditions, an aqueous solution of about 5 to 25% by weight of an anionic surfactant such as polyoxyethylene alkyl sulfate having good liquidity or a nonionic surfactant such as alcohol ethoxylate as a main component is used. Widely marketed as a household cleaner.

As described above, the conventional liquid detergent is an aqueous solution having a surfactant concentration of about 5 to 25% by weight, but recently, it has been required to reduce the distribution cost and environmental conservation by reducing the packaging material, and thus the liquid concentrate is concentrated. There is a strong demand for cleaning agents. However, it is extremely difficult to obtain a liquid concentrated detergent composition having a surfactant concentration of 30 to 40% by weight or more by conventional techniques.
This is 30-40% by weight of conventional detergent surfactants.
This is because when the above aqueous solution is used, a middle phase having no fluidity or a neat liquid crystal having low fluidity is formed. Since these liquid crystals have high viscosity, they have poor dispersibility in water and have a low dissolution rate in water when diluted, making it difficult to use as a household cleaning agent. Although various methods for producing a liquid concentrated detergent have been studied, few examples have been successful so far to the extent that they can be commercialized. This is because it is difficult to prevent the liquid crystal formation and the high-quality liquid concentrated detergent composition cannot be obtained only by concentrating the dilute liquid detergent aqueous solution. For example, when a hydrotrope such as ethanol is added to a detergent, liquid crystals are less likely to be formed and stability at low temperature is increased, but when a large amount is added, problems such as strong irritation to skin occur.

Further, Japanese Patent Publication No. 6-62991 discloses that
40-92 wt% surfactant mixture and 8-60 wt%
A liquid detergent composition comprising water is shown. In this surfactant mixture, at least 50% by weight is a polyether type nonionic surfactant having a specific structure, and the balance is a sulfosuccinic acid ester salt having a specific structure, and the specific surfactant is not mixed in a specific ratio. However, there is a drawback that a uniform liquid cannot be obtained and the liquid viscosity is high. Further, in JP-A-59-157199, a viscosity modifier is added to an anionic surfactant aqueous solution such as α-sulfofatty acid ester salt to obtain an aqueous solution having a low viscosity of 50% by weight. . A polyether alcohol composed of a higher alcohol and an alkylene oxide is used as the viscosity modifier, but the amount added is 10% by weight of the amount of the surfactant, which causes a decrease in foaming power. Further, in this publication, specifically, a high-concentration surfactant aqueous solution exceeding 50% by weight is not obtained.

Further, JP-A-64-38056 describes a cosmetic detergent and a detergent containing a hydroxypolyoxyalkylene alkyl ether sulfate, which is a fatty alcohol sulfate or It is described that the compatibility with the aliphatic alcohol polyglycol ether sulfate is high and that a mixture with these anionic surfactants is preferable as a raw material for liquid soap and the like. However, as a detergent using these surfactant mixtures, there is no specific description regarding the concentration thereof, and there is no description regarding use thereof in a liquid detergent composition having a high concentration.

Further, Japanese Patent Publication No. Hei 4-501735 describes a liquid washing and washing preparation containing a secondary dialkyl ether sulfate (hydroxypolyoxyalkylene alkyl ether sulfate), and a nonionic surfactant. It is also described in combination with. However, in the case of a liquid preparation, the surfactant concentration is described as 15 to 50% by weight, but specifically, only an example of 27.5% is described, and the publication also discloses a high concentration. No mention is made of the concentration of liquid detergent.

As described above, a high-concentration liquid detergent excellent in various properties such as detergency, fluidity, solubility and safety has not been obtained yet.

[0008]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems found in liquid concentrated detergents, has excellent detergency, is less irritating to the skin, and can flow even at high concentrations. It is an object of the present invention to provide a liquid concentrated detergent composition having high properties and excellent in solubility when diluted with water.

[0009]

According to the present invention, a 2-hydroxypolyoxyalkylene alkyl ether sulfate (A) represented by the following general formula (1) and the following general formula (2) are represented. A compound, a compound represented by the general formula (3), and one or more nonionic surfactants (B) selected from higher alkanolamides, and a surfactant containing (A) and (B). The weight ratio is (A) :( B) =
A liquid concentrated detergent composition is provided which is 95: 5 to 15:85.

Embedded image (In the formula, R ₁ is an alkyl group having 4 to 16 carbon atoms, R ₂ is an alkyl group having 1 to 3 carbon atoms, AO is an oxyalkylene group, M
Is a hydrogen ion, an alkali metal ion, a monovalent ion containing an alkaline earth metal, or a substituted or unsubstituted ammonium ion, and m represents a positive number of 3 to 25. )

Embedded image (In the formula, R ₃ is an alkyl group or an alkenyl group having 4 to 16 carbon atoms, R ₄ is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, BO is an oxyalkylene group, and n is a positive number of 3 to 25. Represents.)

R ₅ O (DO) _pH (3) (In the formula, R ₅ represents an alkyl or alkenyl group having 6 to 18 carbon atoms, DO represents an oxyalkylene group, and p represents a positive number from 3 to 25. .)

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The inventors of the present invention have conducted extensive studies to solve the above-mentioned problems and found that a detergent composition containing a 2-hydroxypolyoxyalkylene alkyl ether sulfate having a specific structure is The inventors have found that they are extremely fluid even at high concentrations, have good solubility when diluted in water, and have little irritation to the human body, and have completed the present invention. The 2-hydroxypolyoxyalkylene alkyl ether sulfate represented by the following general formula (1) of the present invention does not form a liquid crystal in the presence of water like a surfactant used in a conventional household cleaning agent. Therefore, even if the concentrated aqueous solution is stored, it does not solidify. Further, even if an undiluted solution or a concentrated aqueous solution is used for washing, there is no problem such as poor water solubility.

Embedded image (In the formula, R ₁ , R ₂ , AO, M and m have the same definition as described above.)

The 2-hydroxypolyoxyalkylene alkyl ether sulfate represented by the general formula (1) used in the present invention will be specifically described. In the formula, R ₁ is an alkyl group having 4 to 16 carbon atoms, preferably 6 carbon atoms.
To 12 linear or branched alkyl groups, specifically, hexyl group, octyl group, decyl group, dodecyl group, tetradecyl group and the like. R ₂ is a lower alkyl group having 1 to 3 carbon atoms. In addition, M is a cation that is ionically bonded to a sulfate ester group, specifically, a hydrogen ion; an alkali metal ion such as sodium, potassium, or lithium;
Monovalent ions containing alkaline earth metals such as magnesium; ammonium ions; substituted ammonium ions formed from lower amines such as trimethylamine and triethylamine, lysine, mono-, di- or tri-lower alkanolamines; and the like. Further, AO is an oxyalkylene group, specifically, an oxyalkylene group having 2 to 4 carbon atoms, and an oxyethylene group, an oxypropylene group or the like is preferable. Furthermore, m is a positive number from 3 to 25, preferably 5 to 15.

Specific examples of the 2-hydroxypolyoxyalkylene alkyl ether sulfate compound represented by the general formula (1) include the following. 2-hydroxy (methoxyhexaethylene glycol) lauryl ether sulfate Na salt, 2-hydroxy (methoxynonaethylene glycol) lauryl ether sulfate Na salt, 2
-Hydroxy (methoxyhexaethylene glycol) myristyl ether sulfate Na salt, 2-hydroxy (ethoxyoctaethylene glycol) myristyl ether sulfate Na salt.

The 2-hydroxypolyoxyalkylene alkyl ether sulfate represented by the general formula (1) in the present invention can be easily produced by a known method.
It is obtained by the method disclosed in JP-A-64-38056.

The liquid concentrated detergent composition of the present invention has a concentration of 5
It is preferably 5% by weight or more, particularly preferably 80 to 100
It is a liquid detergent composition of weight%, and when the concentration is less than 55 weight%, the effect of reducing distribution costs and packaging materials is small. Concentration 5
A liquid detergent composition of 5% by weight or more is a concentration range which is not covered at all in the conventional literature relating to the liquid detergent composition.

The liquid concentrated detergent composition of the present invention is an anionic surfactant which is a 2-hydroxypolyoxyalkylene alkyl ether sulfate compound represented by the general formula (1), which is less irritating to the skin and is excellent in the washing effect. Although (A) is used as the main agent, a specific nonionic surfactant (B) is used in combination with it to improve the detergency. Even when the nonionic surfactant is used in combination, the surfactant concentration is 55 to 100% by weight.
And the cleaning power is improved. The compounding ratio (A) :( B) of the 2-hydroxypolyoxyalkylene alkyl ether sulfate (A) and the specific nonionic surfactant (B) varies depending on the type of the nonionic surfactant (B). The weight ratio is in the range of 95: 5 to 15:85, and when the amount of (A) is too small, liquid crystals may be formed and the fluidity of the composition and the solubility in water may decrease.

Next, the specific nonionic surfactant (B) used in combination with the anionic surfactant represented by the general formula (1) and the composition containing the same will be described in detail. (1) 2-Hydroxypolyoxyalkylene alkyl ether type nonionic surfactant and composition containing the same 2-hydroxypolyoxyalkylene alkyl ether type nonionic surfactant (B-1) represented by the following general formula (2): ) Is a 2-hydroxypolyoxyalkylene alkyl ether sulfate (A) represented by the general formula (1).
It is a surfactant suitable for use together with. Note that (B-
1) is a known nonionic surfactant.

Embedded image In the general formula (2), R ₃ is an alkyl group or an alkenyl group having 4 to 16 carbon atoms, preferably 6 to 1 carbon atoms.
2 is a linear or branched alkyl group, and R ₄ is a hydrogen atom or a lower alkyl group having 1 to 3 carbon atoms. Also, B
O is an oxyalkylene group, and n is a positive number of 3 to 25, preferably 5 to 15. Then, an example of preferred compound as the (B-1), R ₃ is a decyl group, R ₄
Is a methyl group, BO is an oxyethylene group or an oxypropylene group, and n is 5 to 15. Further, specific examples of (B-1) include 2-hydroxyhexaethylene glycol monolauryl ether, 2-hydroxynonaethylene glycol monolauryl ether, and 2-hydroxy polyethylene glycol decyl ether having an average degree of polymerization of oxyethylene groups of 15. Is mentioned.
When (A) and (B-1) are used together, (A) :( B-
The mixing ratio of 1) is preferably in the range of 95: 5 to 25:75 by weight, more preferably 85:15 to 85:15.
It is 30:70 or more. The surfactant mixture concentration in the detergent composition is preferably 55% by weight or more, more preferably 60% by weight or more, and particularly preferably 80 to 100% by weight.

(2) Polyoxyalkylene alkyl ether type nonionic surfactant and composition containing the same A polyoxyalkylene alkyl ether type nonionic surfactant (B-2) represented by the following general formula (3) is used. Is a nonionic surfactant suitable for use in combination with the 2-hydroxypolyoxyalkylene alkyl ether sulfate (A) represented by the general formula (1). Incidentally, (B-2) is also a known nonionic surfactant.

## STR3 ## _{R 5 O (DO) p H} (3) General formula (3), R ₅ is an alkyl or alkenyl group having 6 to 18 carbon atoms, preferably 8 to carbon atoms
14 alkyl groups, which may be linear or branched. Further, DO is an oxyalkylene group, P is 3 to 25,
It is preferably a positive number of 5 to 15. And (B-2)
As specific examples of, hexaethylene glycol lauryl ether, nonaethylene glycol lauryl ether,
Examples include octaethylene glycol myristyl ether, polyethylene glycol decyl ether having an average degree of polymerization of oxyethylene groups of 15 and the like. (A) and (B-2)
When used in combination, the mixing ratio of (A) :( B-2) is preferably in the range of 90:10 to 25:75 by weight,
A more preferable mixing ratio is 80:20 to 25:75.
The concentration of the surfactant mixture in the detergent composition is preferably 55% by weight or more, more preferably 60% by weight or more, and particularly 8
It is preferably from 0 to 100% by weight.

(3) Composition Incorporating Higher Alkanolamide As a nonionic surfactant used in combination with the 2-hydroxypolyoxyalkylene alkyl ether sulfate (A) represented by the general formula (1), a known high-class Alkanolamides (B-3) are also suitable. Used together here (B
-3) is an alkanolamide or the like obtained from a saturated or unsaturated fatty acid having 10 to 18 carbon atoms and an alkanolamine such as monoethanolamine or diethanolamine,
The alkanolamide may be a single substance or a mixture. Examples of higher alkanolamides suitable for use in combination include coconut oil fatty acid diethanolamide, lauric acid monoethanolamide, and lauric acid diethanolamide. When (A) and (B-3) are used in combination, the mixing ratio of (A) :( B-3) is 90: 1 by weight.
The range of 0 to 30:70 is preferable, and the more preferable mixing ratio is 70:30 to 30:70. The concentration of the surfactant mixture in the detergent composition is preferably 55% by weight or more, more preferably 60% by weight or more, and particularly 80 to 10%.
It is more preferably 0% by weight.

(4) The above (B-1), (B-2), (B
-3) A composition in which two or more kinds of surfactants selected from 3) are blended to obtain a nonionic surfactant used in combination with the 2-hydroxypolyoxyalkylene alkyl ether sulfate (A) represented by the general formula (1). , (B-1), and (B
-2), and it is also preferable to use two or more selected from the above (B-3). Also in this case, the concentration of the surfactant mixture in the detergent composition is preferably 55% by weight or more, more preferably 60% by weight or more, and particularly 80 to 100%.
More preferably, it is set to the weight percent.

The liquid concentrated detergent composition of the present invention described in detail above has a pH of 5.0 in order to reduce irritation to the skin.
It is preferably in the range of to 9.0. In order to set the pH in such a range, the cation M in the 2-hydroxypolyoxyalkylene alkyl ether sulfate represented by the general formula (1) is appropriately selected so that the pH is in the above range, or It can be adjusted by adding an appropriate pH adjusting agent to the composition.

If desired, various compounding agents may be added to the composition. That is, a compounding agent that is mixed with a household cleaning agent within a range that does not impair the object of the present invention; for example, moisturizing agents such as polyethylene glycol, propylene glycol, glycerin, sorbitol; methyl cellulose, polyoxyethylene glycol distearate, ethanol, etc. Viscosity modifiers; antiseptics such as p-oxybenzoic acid esters; germicides; antioxidants; fragrances; dyes; ultraviolet absorbers; Further, it is possible to add a surfactant other than the above to the composition, such as an anionic surfactant such as polyoxyethylene alkyl ether sulfate or alkylbenzene sulfonate, amine oxide or amidopropyl betaine. Amphoteric surfactants and the like can be added.

The liquid concentrated detergent composition of the present invention is hypoallergenic to the human body and has excellent detergency. In addition, since the 2-hydroxypolyoxyalkylene alkyl ether sulfate represented by the general formula (1) has a low Kraft point, the storage stability of the product is good when it is made into a liquid detergent composition, and the separation of the components and the precipitation of crystals are performed. There is an advantage that is difficult to cause. Therefore, the composition is in the field of household detergents in which contact with the human body is inevitable, for example, liquid detergents for skin and hair (a) such as body shampoos and shampoos, liquid detergents for tableware (b), walls and the like. It is suitable for cleaning liquids such as liquid cleaners for homes (c) for floors, automobiles (d), furniture and furniture (e), liquid cleaners for clothes (h), and the like. The suitable fields of use are classified according to the surface to be washed; hard surfaces such as tableware, plastic surfaces, metal surfaces, glass surfaces, and ceramic surfaces (f); wooden surfaces such as furniture and pillars (g) Human body surface such as skin and hair; The composition of the present invention is preferably used in each of the above-mentioned fields, but in the composition containing (A) and (B-1) shown in (1) above, (a) and (b) In the field of (g), and in the composition containing (A) and (B-2) shown in (2) above, (b)
And (c) and (e), and in the composition containing (A) and (B-3) shown in (3) above, detergents in the fields (b), (d) and (h). Is particularly preferably used as

[0023]

EXAMPLES Next, the present invention will be explained more specifically with reference to examples and comparative examples, but the present invention is not limited to these examples.

The cleaning composition was evaluated by the following methods. <State of cleaning agent aqueous solution> The state was examined visually and by observation with a polarizing microscope, and the case of a fluid transparent liquid was indicated by ◯, and the case of a non-fluid liquid crystal was indicated by x. <Diluting Solubility> A 1 wt% aqueous solution was used as the sample, and the former was indicated by ◯ and the latter by x, based on the results of visual observation of whether or not the solubility was good. <Protein denaturation rate> 50 mM phosphate buffer (pH 7.0)
To 100 ppm bovine serum albumin was added to the sample, and the surfactant concentration in the aqueous solution was adjusted to 1000 p in total.
pm. After leaving this aqueous solution at room temperature for 3 hours, 220
circular dichroism spectrum of nm is JAS manufactured by JASCO Corporation
It was measured by CO J-720. Then, the amount (%) decreased from the data (blank test) when the surfactant was not included was defined as the denaturation rate. The smaller this value is, the less irritating the human body is. <Washing performance> A polypropylene aqueous solution containing artificial red oil stains containing oil red is added to a surfactant solution 18
0 ml (concentration of activator: 0.026 wt%) was added, and after stirring and washing with a rotary blade for 5 minutes, the cup in which the solution was discarded was air-dried. The cleaning performance was evaluated as follows: the stains on the cup after washing were evenly removed: ○, some were removed: Δ, and none was removed at all: ×.

Examples 1 to 18 and Comparative Examples 1 to 15 Aqueous solutions having respective surfactant concentrations were prepared and the state, dilution solubility, protein denaturation rate and washing performance were measured, and the results are shown in Tables 1 to 4. Indicated. Table 1 shows Examples 1 to 6 in which the 2-hydroxypolyoxyalkylene alkyl ether sulfate (A) and the polyoxyalkylene alkyl ether type nonionic surfactant (B-1) were used in combination, and Comparative Example 1 thereof. ~ 6 are described. In Table 2, Examples 7 to 10 in which the 2-hydroxypolyoxyalkylene alkyl ether sulfate (A) and the polyoxyalkylene ester methyl ether type nonionic surfactant (B-2) are used in combination,
The comparative examples 7-9 were described. In Table 3, Examples 11 to 14 in which the 2-hydroxypolyoxyalkylene alkyl ether sulfate (A) and the higher alkanolamide type nonionic surfactant (B-3) are used in combination, and Comparative Examples 10 to 12 thereof. Was described.

In Tables 1 to 3, the surfactants used in Examples and Comparative Examples are described by symbols, and the symbols represent the following compounds. (1) 2-Hydroxypolyoxyalkylene alkyl ether sulfate (A) represented by the general formula (1) A-1: 2-hydroxy (methoxyhexaethylene glycol) lauryl ether sulfate sodium salt A-2: 2-hydroxy (Methoxynonaethylene glycol) palmityl ether sulfate sodium salt A-3: 2-hydroxy (methoxytriethylene glycol) lauryl ether sulfate sodium salt A-4: 2-hydroxy (methoxypentadecaethylene glycol) myristyl ether sulfate Sodium salt

(2) 2-hydroxy polyoxyalkylene alkyl ether (B-1) represented by the general formula (2) B-11: 2-hydroxy (methoxyhexaethylene glycol) lauryl ether B-12: 2-hydroxy ( Methoxynonaethylene glycol) myristyl ether B-13: 2-hydroxy (methoxypolyethylene glycol) lauryl ether (average addition amount of ethylene oxide: 10 mol) (3) Polyoxyalkylene alkyl ether represented by the general formula (3) (B -2) B-21: Polyoxyethylene lauryl ether (average addition amount of ethylene oxide: 15 mol) B-22: Octaethylene glycol myristyl ether B-23: Hexaethylene glycol lauryl ether (4) Higher alkanolamide (B- 3) B-31: Lauroyldiethanolamide B-32: Myristoyldiethanolamide B-33: Coconut oil diethanolamide

(5) 2-Hydroxypolyoxyalkylene alkyl ether sulfate (C) having a structure other than the general formula (1) C-1: 2-hydroxy (methoxymonoethylene glycol) lauryl ether sulfate sodium salt C-2 : 2-hydroxy (methoxypolyethylene glycol) aralkyl ether sulfate sodium salt (average addition amount of ethylene oxide: 50 mol) (6) polyoxyalkylene alkyl ether sulfonate (D) D-1: sodium lauryl ethoxy sulfate ( Average addition amount of ethylene oxide: 5 moles) The compounds (C) and (D) are excellent surfactants often mixed in household liquid detergents.

[0029]

[Table 1]

[0030]

[Table 2]

[0031]

[Table 3]

From Tables 1 to 3, the detergent compositions of the examples of the present invention are liquids with good fluidity even when the surfactant concentration is 60% by weight or more, have good dilution and solubility, and have extremely low protein denaturation rate. I understand. On the other hand, in the detergent composition of Comparative Example, when the concentration of the surfactant mixture is as high as 60% by weight or more, there is a composition which becomes a non-liquid crystal and has a poor dilution solubility and a large protein denaturation rate. It was In addition, the 2-hydroxypolyoxyalkylene alkyl ether sulfate represented by the general formula (1) and the nonionic surfactants (B-1, B- included in the liquid concentrated detergent composition of the present invention). 2 and B-3) are mixed, it is found that it is not preferable if the mixing ratio is out of the range specified in the present invention (Comparative Examples 2, 7, 10). It should be noted that 2-hydroxypolyoxyalkylene alkyl ether sulfate (C-1, C) similar to the compound represented by the general formula (1) is used.
The compound of -2) has a structure similar to that of the 2-hydroxypolyoxyalkylene alkyl ether sulfate represented by the general formula (1) which characterizes the present invention, but has a fluidity and a diluting solubility. Poor, and the rate of protein denaturation may be high.

[0033]

The liquid concentrated detergent composition of the present invention has excellent fluidity even when it does not contain a solvent such as water or is a high-concentration solution, and forms a liquid crystal when diluted with water. Since it does not, the diluting solubility in water is very good. In addition, the rate of protein denaturation is small and the action on the skin is mild. And
Since the composition can be used for cleaning a wide range of surfaces such as skin and hair as well as hard surfaces and wood surfaces, it is a preferable composition as various household liquid cleaners. That is, the composition of the present invention is a liquid detergent for tableware, a liquid detergent for homes,
It is suitable as a shampoo, body shampoo, etc., and by using the composition as the above-mentioned detergent, the volume of the detergent is significantly smaller than that when using a conventional product, which is extremely useful for reducing distribution cost, and a packaging material. The environmental safety is high because the amount can be reduced.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masami Fujiwara 1-3-7 Honjo, Sumida-ku, Tokyo Lion Corporation

Claims (1)

[Claims] 1. A 2-hydroxypolyoxyalkylene alkyl ether sulfate (A) represented by the following general formula (1), a compound represented by the following general formula (2), and a general formula (3). And a nonionic surfactant (B) selected from higher alkanolamides, and the weight ratio of (A) to (B) is (A) :( B). ) = 95: 5 to 15:85, A liquid concentrated detergent composition. Embedded image (In the formula, R ₁ is an alkyl group having 4 to 16 carbon atoms, R ₂ is an alkyl group having 1 to 3 carbon atoms, AO is an oxyalkylene group, M
Is a hydrogen ion, an alkali metal ion, a monovalent ion containing an alkaline earth metal, or a substituted or unsubstituted ammonium ion, and m represents a positive number of 3 to 25. ) (In the formula, R ₃ is an alkyl group or an alkenyl group having 4 to 16 carbon atoms, R ₄ is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, BO is an oxyalkylene group, and n is a positive number of 3 to 25. R ₅ O (DO) _p H (3) (In the formula, R ₅ is an alkyl group or an alkenyl group having 6 to 18 carbon atoms, DO is an oxyalkylene group, and p is a positive group having 3 to 25 carbon atoms. Represents a number.)